2HR Aquarist · Remineraliser
APT Sky Plus
RO-water tanks keeping Neocaridina shrimp or plants that prefer a little buffering.
1 model
2HR Aquarist · Remineraliser
2HR Aquarist APT Sky
A remineraliser that puts calcium, magnesium and other minerals back into RO or RODI water without raising KH, pH or adding NPK. It lets shrimp and hard-water plants thrive alongside soft-water plants.
Updated
Best for
Soft-water planted tanks and Caridina shrimp tanks started from RO water.
Worth knowing
It is for RO or RODI water; adding it to hard tap water will push GH higher than you want.
What stands out
- Restores GH in RO and RODI water
- Does not raise KH or pH
- No added nitrogen, phosphorus or potassium
Specs
- Brand
- 2HR Aquarist
- Supplies
- GH minerals (calcium, magnesium)
- Adds nitrate and phosphate
- No
- Effect on KH and pH
- None
- Form
- Powder
- How often
- Every water change with RO water
- Suits
- Soft-water and Caridina tanks
- Sizes
- Mini (70 g), Small (150 g), Large (800 g)
Figures from the maker's published specifications. Makers revise products, so check the current figures before buying. Photos supplied by the brand or its distributor.
Compare with
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2HR Aquarist · Foliar spray
APT Dew
The dry-start phase of a carpet, and emersed mosses and plants above the waterline.
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2HR Aquarist · Nutrient aquasoil
APT Feast
New planted tanks and soft-water shrimp setups that want a feeding substrate from day one.
1 model
Frequently asked questions
Quick answers about the 2HR Aquarist APT Sky, drawn from its specs.
Who is the 2HR Aquarist APT Sky best for?
Soft-water planted tanks and Caridina shrimp tanks started from RO water.
Is there anything to watch out for with the 2HR Aquarist APT Sky?
It is for RO or RODI water; adding it to hard tap water will push GH higher than you want.
What are the alternatives to the 2HR Aquarist APT Sky?
Other fertilisers & treatments worth comparing: 2HR Aquarist APT Sky Plus, 2HR Aquarist APT Balance, 2HR Aquarist APT Dew. Add any of them to the compare table to see the specs side by side.
How do I compare the 2HR Aquarist APT Sky with similar products?
Tap Compare on this page and on any other fertiliser or treatment you are considering, then open the compare table. It lines up every published spec side by side and lets you pick the size of each product.